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Index funds vs picking individual stocks
Should I buy individual US stocks or just an index fund?
Short answer: The measured record is unambiguous: most active investors, professional and retail, underperform a low-cost index over long periods. That is the base rate you are betting against when you pick individual stocks. It does not mean picking is irrational — but it should be a deliberate decision made with a portion of your capital, not the default.
Why the base rate is so unforgiving
Index returns are driven by a small minority of holdings. Miss those few names and you underperform even with a portfolio of otherwise reasonable companies. An index fund guarantees you own them.
A workable compromise
A core index position with a defined satellite allocation for individual picks. It caps the damage from concentration while leaving room for conviction, and it makes your stock-picking performance measurable against a benchmark you actually hold.
The concentration you already own
An S&P 500 fund is not diversified in the way most people assume — the largest handful of holdings drive most of the annual move. Adding those same mega caps individually concentrates rather than diversifies.
Where to do it
Frequently asked questions
How many stocks do I need to be diversified?
Diversification improves quickly to roughly 20-30 holdings across sectors and flattens after that. Below about 10, single-name risk dominates your outcome.
Can I hold both?
Yes, and most sensible portfolios do — an index core with a smaller, ring-fenced allocation for individual positions.
Reviewed August 2026. Information only — not investment, tax or legal advice.